Warp stop motion



May 8, 1928.

H. P. HUNTER WARP s1 o1= MOTION Filed Oct. 29, 1926 2 Sheets-Sheet 1 May 8, 1928.

H. P. HUNTER WARP STOP MOTION Filed Oct. 29. 1926 2 Sheets-Sneet 2 Patented May 8, 1928.

UNITED STA an, or anniinson, sourn oaaonma nanny P. HUNT This invention is B PATENT omen.-

WARP sror m Application filed Qctober 2 warp stop motions for looms, and the prin oipal ob ect of the invention simple, novel, and tion, constructed so and positive stopping or more warp thr is to provide a eliicientwarp stop meas to insure quick acting of the lOOllilIl case'one eads should break, the

heddles in no way confining or'w'eighting the warp threads.

Another object oi the invention is to. ro-

vide a novel pivoted detector, o'rhe 'dle, which will not weight or confine the warp threads, but will allow the threads to pass from the whip-roll through large slots in the upper lighter ends from the warp threads.

of the heddles to the as is the case when using ldrop wires suspended In my invention no lease rods, or rods of any kind, are necessary to hold the yarn do the action of the heddles, the yarn in the upper slack, and allowing easily driven into place,

duot'ion of reed cloth by wn in order to facilitate thereby permitting harness to remain filling threads-to be preventing the prothe loom-f Other the minor objects or the invention will be hereinafter set forth.

I will explain the invention with reference to, the accompanying drawings which illustrate one practical embodiment thereof,

to enable others familiar with the art to adopt and use the same,

and will summarize in the claims the novel features of: construction, and which protection is In said drawings Fig. 1 is a persp novel combinations of parts, for

desired.

ective view of my novel warp stop action applied to alooin; V

Fig. 2 is an enl dles in positi loom;

Fig. 3 warp stop motion;

on to Fig. l is a section 4 11, Fig. 3,

tion on the line banks of heddles in ation of'the loom.

As shown in the re motion detached showing the "ed end view of the stop banks o fhedpermit operation of the is a partial end elevation of the through the stop mo- ,showing the position to prevent operdrawing, niy stop motion 1 preferably is housed in a frame consisting of side members 1, and end members 1", said side members front of, the warp'lb being extend across the full rear of the harness,

of suflicient length to 'widthlof the loom, in

and over and slightly 1!! cam, The frame is pret- 9, 1926'. Serial m5; 145,045.

c'rablyo-pen at its top and bottom, and is provided with pairs ofproj'ecting lugs 1 from each end 1", saidlugs being adapted to rest upon tables A onthe loom frame to support the frame in operative position on the loom, bolts A in tables A" being disposed bet-ween the lugs *1 to position the frame on tlietables. Within the frame are two spaced parallel rods 4 and 5, adjacent the upper end of the frame, for pivotally supporting'the banks of heddles, designated by the numerals 2 and 3 in" the drawings, t e rods 4 and obeing threaded at each end and provided with nuts for maintaining the rods in the frame.

harness, whereby no tension will be exerted Heddles 2 and 3 are formed substantially L-shaped, the vertical legs 2, 3 being preterably oval-shaped, and provided with large, oval-shaped openings. The horizontallegs ofthe heddles are provided'withhooks 2, 3, at their lower ends for the purpose hereinafter set-lorth. The lieddles are pivoted on the parallel rods 4: and 5 within the-frame, the pivots for the heddles being disposed at pointsnearer the oval-shaped vertical ends 2*, 3 than the hooked ends 2, 3 causing the preponderance of weightof the heddles to be at the hooked ends 2, 3, so that the hooked ends will normally drop by gravity. The heddles are arranged on the rods 4, 5, with the verticallegs or one bank of heddles disposed toward the back of the loom, and vertical legsoi. the other bankof heddles disposed toward the liarness or front end of the loom.

' The warp threads L are passed through the openings in the vertical legs of the heddles so that the threads will touch the lower ends of the openings to maintain the hooked ends 2, 3 of the heddles in raised position, but if any thread shouldbreak, itsrelated heddle wouldimmediately drop and thereby cause the loom to stop: as hereinafter de scribed. Each heddleQ and-3 will have as many warp threadspassing through the slot in itsvertical leg as there are harnesses re quired to weave the particular fabric being woven. Hence, if print-cloth other cloths which are ordinarily woven with two harnesses are being made, it is necessary to pass two threads through the slot or openin in each heddle," in order that one warp't read'will alwaysbe down when-the loom picks, and never more than one thread. Thelieddles 2and 3 are held down by'the lower thread so,

await a thread from either the front or back harness breaks, the 100m will stop when that harness is'depressed.

In weaving a drill, orthree-harness weave, three threads can be drawn per heddle, 'if the harnesses are set for a two up and one down weave. F or a four-harness twill, woven three up and one down, fourthreads per heddle can be carried by the heddles, and for a five-harness (sateen) weave, five threads can and must be drawn per heddle. It can be seen that this arrangement will greatlyreduce the necessary number of heddles, it being customary to use one heddle for each thread contained in the Warp.

Below the heddles 2 and 3, in the frame, are parallel rock shafts 8 and 9 journaled in the end members 1 of the frame adjacent the bottom thereof, and on shafts 8 and 9 are intermeshing quadrants or gears 10 and 11 respectively where the motion of one shaft is imparted to the other to cause the other to rock in the opposite direction. On shafts 8 and 9 respectively are upright arms 8", 9 respectively carrying plates 6 and 7, which are adapted to oscillate immediately below hooked ends 2 3, of the heddles when the heddles are maintained in raised position byt-he warp threads, but in case a heddle should drop dueto the breaking of a warp 7 would engage the hooked. end of'the heddle and prevent the oscillation of plates, 6 and 7 as shown in Hence the motion causes the plates 6 of rock shafts 8 and 9 and 7 to oscillate so that their inner edges almost touch each other when they are oscillated toward the center of the box as shown in Fig. 4, and to nearly touch the sides of the box when they are oscillated in the outward direction as in Fig. 2. A positive movement is provided for moving the plates 6, 7, toward each other, but the outward return movement is caused by a yield-able spring hereinafter described having one end attached to the loom frame and the other end attached to a lever keyed to one of the shafts 8 or 9, whereby the motion can be easily stopped, if one of the heddles should be released by the breaking of a warp thread, at which time the heddle would drop into a. position that the hook 2 or 3 would engage the plate 6 or 7.

The means for positively moving the plates toward each other comprises an arm 9 loosclymounted on the shaft 9 and readily rotatable thereon. Arm 9 is held in place on said shaft by collars 9, fixedly mounted on the shaft'9 at each side of the arm 9 to prevent end-wise movement. On

the inner side of one collar 9 is'a projection 9 adapted to enter an arcuate slot 9 in the adjacent face of the hub of arm 9 The collars are attached to the shaft 9 by means of set screws, and the two projections 9 adjusted to proper position in the slot 9 before the shaft 9 is revolved the collar 9 is fastened to the shaft 9 by its set screw above mentioned. T 1e projection 9 and slot 9 allows the arm 9 to rock the shaft 9 in one direction only; that is, when the arm 9 is rocked in a direction which causes the slot in its hub to press against the projection 9 on the rigidly attached collar, in that direction, and 10 and 11 plates 6 and 7 are ,moved towards each other. Attached to the rock shaft 9 is another arm 9 Which extends horizontally, toward the back of the loom, and lever 9 of a spring 12, the other end of spring 12 being attached to a stud A on the frame of the loom. The rock shaft 9 to which the arm 9 is attached, extends through the end l of the heddle frame a sufiicient distance to receive the arm 9 whereby the arm 9 is disposed outside the heddle box and near the side of the 100111.

On the crank shaft A of the loom, is an eccentric 13, preferably made in two parts in order that it may be easily placed on the crank shaft, and to eccentric 13 is attached a connecting rod 13 by means of an eccentric strap, 13". The outer end of the rod 13 is attached to the arm 9 and imparts to it a rocking motion as the crank shaft A rotates. plates 6, 7, to move toward the center of the heddle box or toward each other. ,The return motion of the arm would leave the plates 6, 7, in this central position by reason of the pin and slot engagementof arm 9 and collar 9, but the movement of the shaft 9 to carry the plates 6, 7, to their central position has raised the spring arm 9 thereby increasing the tension of the spiral spring 12, which causes the shaft 9 to return with the arm 9" unless its movement is arrested by the dropping of the hook on one of the heddles 2, 8, caused by the breaking of a thread L.

Attached to the rock shaft 9 but at the opposite end to that to which the lever 9" is attached, is an arm 23 which is connected through a link lawith the usual means for stopping the operation of the loom.

The heddles, as arranged in my warp stop motion, do not in any way detract from the appearance of the cloth, but permit the weaving of a fabric as free from a freedy ap 'iearance could be woven were no warp stop motion used on the loom.

I do not limit my invention to the exact by reason of gears form shown in the drawings forobviously changes may be made therein within the scope of the claims. a

I claim:

1. In a warp stop motion for looms, a frame ;,a rod n said frame; a plurality of heddles for the warp threads pivotally mounted on said r'od, said heddles having hooked lower ends; and oscillating member One motion of arm 9 causes the two a is connected with one end mounted on said rod, said mounted in the frame below the hooked ends of said heddles and adapted to control the operation ofthe loom" and means for positivelymoving the member in one direction; and means for yieldably moving the member in the opposite direction, each heddle comprising a substantially L-shaped member having a slot for the warp threads in its vertical leg; the hook being on the horizontal leg; and the pivot point being disposed nearer the slotted end thanthe hooked end, whereby the hooked end thereof will normally drop cillating member.

2. In a warp stop motion for looms, a frame; a rod-in said frame; a pluralityof heddles for c the warp threads pivotally heddles having hooked lower ends; and oscillating member mounted in the frame below the hooked ends of said heddles and adapted to control the operation of the loom and means for positively moving the member in one direction;

and means for yieldably moving the memher in the opposite direction, said positive moving means comprising a lateral pro ection on said oscillating member; a lever loosely mounted on said member and having an arcuate slot therein for said projection; an eccentric on the loom shaft; and a link connecting the eccentric with the lever.

3. A warp stop motion comprising a frame adapted to be mounted on a loom; parallel rods mounted in said frame; opposed banks of heddles pivotally mounted on said rods, said heddles having depending hooks on their lower ends, the lower hooked ends of one bank crossing those of the other bank; positively moving oscillating members mounted in the frame below each bank of heddles and adapted to be embraced between the hooked ends of the bank in one position of the heddles to prevent separation of the members; means for positively moving the members towards each other; means or yield-ably separating the members; and a control connected with said members for stoppii'ig the projection; an eccentric on operation of the loom when the hooked end of one or more heddles engage its related oscillating member.

4;. In mechanism as set forth in claim 3, each heddle comprising a substantially L- shaped member having a slot for the warp threads in its vertical. leg, the hook being on the horizontal leg; and the pivot point being disposed nearer the slotted end than the hooked end, whereby the hooked end thereof will normally drop bygravity into the path of related oscillating member.

5. In mechanism as set forth in claim 3,

said positive movmg means comprising a lateral projection on said oscillating memher; a lever loosely mounted on said member and having an arcuate slot therein for said the loom shaft;

by gravity into the path of related os.

and a link connecting the eccentric on the loom shaft; and a link connecting the eccentrio with the lever. p

6. A warp stop motion comprisinga frame adapted to be mounted on a loom ;"pa'rallel rods mounted in said frame; opposed banks of heddles pivotally mounted on said rods, said heddles having depending hooks on their lower ends, the lower hookedends of one bank crossing those of the other bank; parallel rock shafts mounted'in the frame below said rods; oppositely moving oscillatory members on said rock shafts below the hooked ends of said heddles and adapted in one position of the heddles to be embraced between the hooked ends to prevent separation of the members; means for posi tively moving the members other; means for yieldably separating the members; and means connected with said rock shafts for stopping the operation of the loom when the hooked end of one or more heddles; engage its related oscillating member;

7. In mechanism as set forth in claim 6', each heddle comprising a substantially L- shaped member having a slot for the warp threads in its vertical leg; the hook being on the horizontal leg; and the pivot point being disposed nearer the slottedend than the hooked end, whereby the hooked end thereof will normally drop by gravity into the path of related oscillating member when the warp thread is broken.

8. In mechanism asset forth in claim 6, said rockshafts being geared together; and said positive moving means comprising a collar on one rock shaft having a lateral projection; a lever loosely mounted on said rock shaft adjacent the collar and having an arcuate slot therein for said projection; an eccentric on the loom shaft; and a link connecting the eccentric with the lever.

9. A warp stop motion comprising a frame adapted to be mounted on a loom; parallel rods mounted in said frame; opposed banks of heddles pivotally mounted on said rods; the hooks of one bank crossing and opposing those of the other bank; said heddles having depending hooks on their lower ends; parallel rock shafts mounted in the frame below said rods; intermeshing gears on said rock shafts; oppositely moving oscillatory members on the rock shafts respectively below the hooked ends of said heddles and adapted in one position of the heddles to be embraced between the opposed hooked ends to prevent separation of the members; means for positively driving the members towards each other; means for yieldably separating the members; and means connected with said rock shafts for stopping the operation of the loom when the hooked end of one or more heddles engage its related oscillatory member.

towards each 10. In mechanism as set forth in claim 9, each heddle comprising a substantially L- shaped member having a slot for the Warp threads in its vertical leg; the hook being on the horizontal leg; and the pivot point being disposed nearer the slotted end than the hooked end, whereby the hooked end thereof Will normally drop by gravity into the path of related oscillating member, When the Warp thread is broken.

l1. lninechamsm as set forth in claim 9, said positive driving means comprising a collar on one rock shaft having a lateral projection; a lever loosely mounted -on said rock shaft adjacent the collar and having an arcuate slot therein for said projection; an eccentric on the loom shaft; and a link connecting the eccentric with the lever.

12. In mechanism as set forth in claim 9, said yieldable means comprising a lever on one rock shaft; and a spring connecting said lever with the loom frame.

A warp stop motion comprising a frame adapted to be mounted on a loom; parallel rods mounted in said frame; opposed'banks of heddles pivotally mounted on said rods, each heddle comprising a substantially L-shaped member having a slot for the Warp threads in its vertical leg; and having a depending hook on the outer end of its horizontal leg; the Warp threads engaging the lower end of the slots; and the pivot point being disposed nearer the slotted end than the hooked end, whereby the hooked end thereof will normally drop by gravity When the thread is broken; oscillating members mounted in the frame below said heddle banks; means for positively driving the members towards each other; means for yieldably separating the members; and means connected With said members for stopping the operation of the loom When the hooked end of one or more heddles engage its related oscillating member.

1 In mechanism as set forth in claim 13, said positive driving means comprising a lateral projection on said oscillating memher; a lever loosely mounted on said mom her and having an arcuate slot therein for said projection; an eccentric on the loom shaft; and a link connecting the eccentric with the lever. 7

15. In mechanism as set forth in claim 9, said yieldable means comprising a lever on said oscillating member, anda spring con-v necting said lever With the loom frame.

In testimony that I claim the foregoing as my own, I affix my signature.

HENRY 'P. HUNTER. 

